body, button, input, optgroup, select, textarea {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC","Helvetica Neue",STHeiti,"Microsoft Yahei",Tahoma,Simsun,sans-serif;
}

ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

a {
  text-decoration: none;
}

img {
  vertical-align: top;
}

button {
  outline: none;
}
